diff --git a/src/components/views/settings/tabs/room/RolesRoomSettingsTab.js b/src/components/views/settings/tabs/room/RolesRoomSettingsTab.js
index 8aabc8d340..6b5fded674 100644
--- a/src/components/views/settings/tabs/room/RolesRoomSettingsTab.js
+++ b/src/components/views/settings/tabs/room/RolesRoomSettingsTab.js
@@ -306,6 +306,11 @@ export default class RolesRoomSettingsTab extends React.Component {
             </div>;
         });
 
+        // hide the power level selector for enabling E2EE if it the room is already encrypted
+        if (client.isRoomEncrypted(this.props.roomId)) {
+            delete eventsLevels["m.room.encryption"];
+        }
+
         const eventPowerSelectors = Object.keys(eventsLevels).map((eventType, i) => {
             let label = plEventsToLabels[eventType];
             if (label) {
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index ce4598ed5f..c28431bc26 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -681,6 +681,7 @@
     "Change permissions": "Change permissions",
     "Change topic": "Change topic",
     "Upgrade the room": "Upgrade the room",
+    "Enable room encryption": "Enable room encryption",
     "Modify widgets": "Modify widgets",
     "Failed to unban": "Failed to unban",
     "Unban": "Unban",